The correct answer for this question is D) <span>Threshold frequency depends on the work function of a metal.
</span><span>It does not depend on intensity. Intensity of light only affects the number of electrons ejected. Threshold frequency is dependent on the type of metal . It is not determined by the incident photon . Each metal has its own threshold frequency. So the most feasible answer is d.</span>
When the tuning forks are struck simultaneously, the beat frequency is equal to the absolute value of the difference between the frequencies of the two tuning forks:
where
is the beat frequency, and
are the frequencies of the two forks.
In the first part of the problem,
and
, with
being the frequency of the unknown fork. In the second part of the problem,
and
. So we have the following system of two equations:
and the solution of this system is
As the radial distance between two objects increases, the gravitational force which pulls the two towards each other decreases following the inverse square law. This is based on Newton's Law of Universal Gravitation, which as an equation states . If the distance between the two is doubled, the force of gravity is only 1/4 as strong. If it is tripled, it is only 1/9 as strong, and so on.
<h2>
Hey There!</h2><h2>_____________________________________</h2><h2>
Answer:</h2><h2>_____________________________________</h2><h3>DATA:</h3>
Angle of projection = θ(theta) =
Initial Velocity = =
Acceleration due to gravity = g = 9.8 m/s^2
Vertical Velocity = = ?
Horizontal Velocity = = ?
Range of the Shell = R = ?
Maximum Height = H = ?
<h2>_____________________________________</h2><h3>SOLUTION:</h3>
Vertical Velocity is given by,
θ
Horizontal Velocity is given by,
θ
Range is given by,
R = Sin2θ
Horizontal Velocity is given by,
<h2>
_____________________________________</h2><h2>Best Regards,</h2><h2>'Borz'</h2>
Answer:
(a)7.48331 Km
(b) Directly above the tomb
(c) 12.53 degrees
Explanation:
Given that the distance is 3.5 Km, converted to meters we obtain 3500 m
Using the formula
where s is the distance and t is time, taking acceleration due to gravity as 9.8 then
t = 26.72 sec
We know that speed=distance/time hence to get the distance in part (a)
Distance=Speed*time
280 *26.72 = 7483.31 m converted to Km we obtain 7.48331 Km
(b)directly above the bomb
(c)